Surface Gage, 3.5x3-3/16, 3/8 D, 12/18 In L, Starrett, Mfr#: 257D

Surface Gauge Scribers, Base Size 3 1/2 in x 3 3/16 in, Spindle Diameter 3/8 in, Step Type V-Step, Includes Scriber, Number of Pins 4, Scriber Diameter 5/32 in, Scriber Length 8 1/2 in, Snug Mount Hole Diameter 9/64 in, 5/32 in, 3/16 in, 1/4 in, Spindle Length 12 in and 18 in